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Seismic Response of Buildings Resting on Soil Isolated With EPS Geofoam Buffer
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Author(s): Sreya M. V. (National Institute of Technology, Karnataka, India), Jayalekshmi B. R. (National Institute of Technology, Karnataka, India)and Katta Venkataramana (National Institute of Technology, Karnataka, India)
Copyright: 2022
Volume: 13
Issue: 1
Pages: 18
Source title:
International Journal of Geotechnical Earthquake Engineering (IJGEE)
Editor(s)-in-Chief: T.G. Sitharam (Indian Institute of Science, India), J. S. Vinod (University of Wollongong, Australia)and Ravi Jakka (Indian Institute of Technology Roorkee, India)
DOI: 10.4018/IJGEE.298987
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Abstract
The present study deals with analyzing the efficacy of EPS (Epoxy Polystyrene) geofoam buffer as a soil-isolation medium to reduce the seismic energy transferred and, thereby to reduce the dynamic response of buildings under earthquake induced loads. Finite element simulation of the transient response of an integrated soil isolation-building system in which, buildings resting on raft foundation in medium dense sand beds, with and without soil-isolation mechanism has been carried out using a recorded accelerogram of El Centro earthquake. Four sets of three-dimensional buildings (one, two, three and four-storey) of single bay moment resisting concrete frames have been considered for the analysis. The EPS geofoam buffer of various thicknesses was placed at different depths below the raft foundation. The results under field-scale conditions indicate that soil isolation provided by the EPS geofoam buffer substantially reduces the earthquake energy transmission to the superstructure during a strong earthquake.
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